(n.) The study of living organisms\; that branch of knowledge which treats of living matter as distinct from matter which is not living; the study of living tissue. It has to do with the origin, structure, development, function, and distribution of animals and plants.

aerobiology agrobiology anatomy animal physiology anthropology astrobiology bacteriology biochemics biochemistry biochemy bioecology biological science biometrics biometry bionics bionomics biophysics botany cell physiology comparative anatomy conchology cryobiology cybernetics cytology ecology electrobiology embryology entomology enzymology ethnobiology ethology exobiology genetics gnotobiotics helminthology herpetology ichthyology life science malacology mammalogy microbiology molecular biology ornithology pharmacology physiology protozoology radiobiology taxidermy taxonomy virology xenobiology zoogeography zoography zoology zoonomy zoopathology zoophysics zootaxy zootomy